package org.springblade.common.tool;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.nio.charset.Charset;
import java.security.GeneralSecurityException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocket;
import javax.servlet.http.HttpServletResponse;

import cn.hutool.json.JSONUtil;
import org.apache.http.HttpEntity;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ConnectTimeoutException;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContextBuilder;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.conn.ssl.X509HostnameVerifier;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.MultipartFile;

public class HttpUtil {

	private static final Logger log = LoggerFactory.getLogger(HttpUtil.class);

	private static PoolingHttpClientConnectionManager connMgr;
	private static RequestConfig requestConfig;
	private static final int MAX_TIMEOUT = 3600000;// 7秒
	private static final String UTF_8 = "UTF-8";
	public static final String JSON = "json";
	public static final String XML = "xml";
	public static final String XXX = "xxx";
	private static final CloseableHttpClient httpclient = HttpClients.createDefault();
	static {
		// 设置连接池
		connMgr = new PoolingHttpClientConnectionManager();
		// 设置连接池大小
		connMgr.setMaxTotal(100);
		connMgr.setDefaultMaxPerRoute(connMgr.getMaxTotal());
		RequestConfig.Builder configBuilder = RequestConfig.custom();
		// 设置连接超时
		configBuilder.setConnectTimeout(MAX_TIMEOUT);
		// 设置读取超时
		configBuilder.setSocketTimeout(MAX_TIMEOUT);
		// 设置从连接池获取连接实例的超时
		configBuilder.setConnectionRequestTimeout(MAX_TIMEOUT);
		// 在提交请求之前 测试连接是否可用
		configBuilder.setStaleConnectionCheckEnabled(true);
		requestConfig = configBuilder.build();
	}

	/**
	 * 发送 GET 请求（HTTP），不带输入数据
	 *
	 * @param url
	 * @return
	 * @throws IOException
	 */
	public static String doGet(String url) throws IOException {
		return doGet(url, null);
	}

	/**
	 * 发送 GET 请求（HTTP），K-V形式
	 *
	 * @param url
	 * @param header
	 * @return
	 * @throws IOException
	 */
	public static String doGet(String url, Map<String, String> header) throws IOException {
		HttpGet httpGet = new HttpGet(url);


		//设置头部
		for(Map.Entry entry:header.entrySet()){
//            System.out.println(entry.getKey()+ "###########" + entry.getValue());
			httpGet.setHeader(entry.getKey().toString(),entry.getValue().toString());
		}
//        System.out.println(jsonObject.toString());


//        HttpGet httpget = new HttpGet(url);
		CloseableHttpResponse response = null;
		try {
			response = httpclient.execute(httpGet);
		} catch (IOException e1) {
			e1.printStackTrace();
		}
		String result = null;
		try {
			HttpEntity entity = response.getEntity();
			if (entity != null) {
				result = EntityUtils.toString(entity);
			}
		} catch (ParseException | IOException e) {
			e.printStackTrace();
		} finally {
			try {
				response.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return result;
	}
	public static void doGetFile(String apiUrl, Map<String, String> parms, HttpServletResponse resp) throws IOException{
		//设置头部
		CloseableHttpResponse response = null;
		CloseableHttpClient httpClient = HttpClients.createDefault();
		apiUrl+="?parms="+URLEncoder.encode(URLEncoder.encode(JSONUtil.toJsonStr(parms)));
		HttpGet httpGet = new HttpGet(apiUrl);
		try {
			response = httpClient.execute(httpGet);
			HttpEntity entity = response.getEntity();
			// System.out.println(response.getStatusLine().getStatusCode());
			int status = response.getStatusLine().getStatusCode();
			resp.setStatus(status);
			if (status==200 && entity!=null) {
				//Content-Type根据文件实际类型设置
//				resp.setHeader("Content-Type", "application/pdf;charset=utf-8");
				resp.setHeader("Content-Type", entity.getContentType().toString().split(":")[1]);
				resp.setHeader("Content-Length", entity.getContentLength()+"");
				resp.setHeader("Content-Encoding", "UTF-8");

				InputStream is = entity.getContent();
				OutputStream os = resp.getOutputStream();

				byte[] buffer = new byte[1024];
				int ch;
				while ((ch = is.read(buffer)) != -1) {
					os.write(buffer, 0, ch);
				}
				is.close();
				os.flush();
				os.close();
			}
		} catch (Exception e) {
			e.printStackTrace();
		}finally {
			if (response != null) {
				try {
					EntityUtils.consume(response.getEntity());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
	}
	/**
	 * 发送 POST 请求（HTTP），不带输入数据
	 *
	 * @param apiUrl
	 * @return
	 * @throws ConnectTimeoutException
	 */
	public static String doPost(String apiUrl) throws IOException {
		return doPost(apiUrl, new HashMap<String, String>());
	}

	/**
	 * 发送 POST 请求（HTTP），K-V形式
	 *
	 * @param apiUrl API接口URL
	 * @param params 参数map
	 * @return
	 * @throws ConnectTimeoutException
	 */
	public static String doPost(String apiUrl, Map<String, String> params) throws IOException {
		CloseableHttpClient httpClient = HttpClients.createDefault();
		String httpStr = null;
		HttpPost httpPost = new HttpPost(apiUrl);
		CloseableHttpResponse response = null;

		try {
			httpPost.setConfig(requestConfig);
			List<NameValuePair> pairList = new ArrayList<>(params.size());
			for (Map.Entry<String, String> entry : params.entrySet()) {
				NameValuePair pair = new BasicNameValuePair(entry.getKey(), entry.getValue());
				pairList.add(pair);
			}
			httpPost.setEntity(new UrlEncodedFormEntity(pairList, Charset.forName("UTF-8")));
			response = httpClient.execute(httpPost);
			HttpEntity entity = response.getEntity();
			httpStr = EntityUtils.toString(entity, "UTF-8");
		} finally {
			if (response != null) {
				try {
					EntityUtils.consume(response.getEntity());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return httpStr;
	}

	/**
	 * 发送 POST 请求（HTTP），JSON形式
	 *
	 * @param apiUrl
	 * @param content 内容
	 * @return
	 * @throws IOException
	 */
	public static String doPost(String apiUrl, String content, String type) throws IOException {
		CloseableHttpClient httpClient = HttpClients.createDefault();
		String httpStr = null;
		HttpPost httpPost = new HttpPost(apiUrl);
		CloseableHttpResponse response = null;

		try {
			httpPost.setConfig(requestConfig);
			StringEntity stringEntity = new StringEntity(content, "UTF-8");// 解决中文乱码问题
			stringEntity.setContentEncoding("UTF-8");
			if (JSON.equals(type) || "application/json;charset=UTF-8".equals(type)) {
				stringEntity.setContentType("application/json");
			} else if (XML.equals(type)) {
				stringEntity.setContentType("application/xml");
			} else if (XXX.equals(type)) {
				stringEntity.setContentType("application/x-www-form-urlencoded");
			} else {
				stringEntity.setContentType("text/plain");
			}
			httpPost.setEntity(stringEntity);
			response = httpClient.execute(httpPost);
			HttpEntity entity = response.getEntity();
			// System.out.println(response.getStatusLine().getStatusCode());
			httpStr = EntityUtils.toString(entity, "UTF-8");
		} finally {
			if (response != null) {
				try {
					EntityUtils.consume(response.getEntity());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return httpStr;
	}

	/**
	 * 发送 POST 请求（HTTP），JSON形式 + url k-v参数
	 *
	 * @param apiUrl
	 * @param content
	 * @param params
	 * @param type
	 * @return
	 * @throws IOException
	 */
	public static String doPost(String apiUrl, String content, Map<String, String> params, String type) throws IOException {
		// url参数拼接
		if (params != null) {
			int i = 0;
			StringBuffer param = new StringBuffer();
			for (String key : params.keySet()) {
				if (i == 0)
					param.append("?");
				else
					param.append("&");
				param.append(key).append("=").append(params.get(key));
				i++;
			}
			apiUrl += param;
		}

		CloseableHttpClient httpClient = HttpClients.createDefault();
		String httpStr = null;
		log.info("本次请求apiUrl:" + apiUrl);
		HttpPost httpPost = new HttpPost(apiUrl);
		CloseableHttpResponse response = null;

		try {
			httpPost.setConfig(requestConfig);
			StringEntity stringEntity = new StringEntity(content, "UTF-8");// 解决中文乱码问题
			stringEntity.setContentEncoding("UTF-8");
			if (JSON.equals(type)) {
				stringEntity.setContentType("application/json");
			} else if (XML.equals(type)) {
				stringEntity.setContentType("application/xml");
			} else if (XXX.equals(type)) {
				stringEntity.setContentType("application/x-www-form-urlencoded");
			} else {
				stringEntity.setContentType("text/plain");
			}
			httpPost.setEntity(stringEntity);
			response = httpClient.execute(httpPost);
			HttpEntity entity = response.getEntity();
			// System.out.println(response.getStatusLine().getStatusCode());
			httpStr = EntityUtils.toString(entity, "UTF-8");
		} finally {
			if (response != null) {
				try {
					EntityUtils.consume(response.getEntity());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return httpStr;
	}

	public static String doPost(String apiUrl, String content, String type, Map<String, String> headers) throws IOException {
		CloseableHttpClient httpClient = HttpClients.createDefault();
		String httpStr = null;
		HttpPost httpPost = new HttpPost(apiUrl);
		CloseableHttpResponse response = null;

		try {
			httpPost.setConfig(requestConfig);
			if (headers != null) {
				for (String headerName : headers.keySet()) {
					httpPost.setHeader(headerName, headers.get(headerName));
				}
			}
			StringEntity stringEntity = new StringEntity(content, "UTF-8");// 解决中文乱码问题
			stringEntity.setContentEncoding("UTF-8");
			if (JSON.equals(type)) {
				stringEntity.setContentType("application/json");
			} else if (XML.equals(type)) {
				stringEntity.setContentType("application/xml");
			} else {
				stringEntity.setContentType("text/plain");
			}
			httpPost.setEntity(stringEntity);
			response = httpClient.execute(httpPost);
			HttpEntity entity = response.getEntity();
			// System.out.println(response.getStatusLine().getStatusCode());
			httpStr = EntityUtils.toString(entity, "UTF-8");
		} finally {
			if (response != null) {
				try {
					EntityUtils.consume(response.getEntity());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return httpStr;
	}

	public static String doPostXXX(String apiUrl,Map<String,String> content){
		CloseableHttpClient httpClient = HttpClients.createDefault();
		String httpStr = null;
		HttpPost httpPost = new HttpPost(apiUrl);
		CloseableHttpResponse response = null;

		try {
			httpPost.setConfig(requestConfig);
			List<NameValuePair> pairList = new ArrayList<NameValuePair>(content.size());
			for (Map.Entry<String, String> entry : content.entrySet()) {
				NameValuePair pair = new BasicNameValuePair(entry.getKey(), entry.getValue());
				pairList.add(pair);
			}
			httpPost.setEntity(new UrlEncodedFormEntity(pairList, Charset.forName("utf-8")));
			response = httpClient.execute(httpPost);
			HttpEntity entity = response.getEntity();
			// System.out.println(response.getStatusLine().getStatusCode());
			httpStr = EntityUtils.toString(entity, "UTF-8");
		} catch (Exception e) {
			e.printStackTrace();
		}finally {
			if (response != null) {
				try {
					EntityUtils.consume(response.getEntity());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return httpStr;
	}
	public static void doPostXXXDownFile(String apiUrl, Map<String,String> content, HttpServletResponse resp){
		CloseableHttpClient httpClient = HttpClients.createDefault();
		String httpStr = null;
		HttpPost httpPost = new HttpPost(apiUrl);
		CloseableHttpResponse response = null;

		try {
			httpPost.setConfig(requestConfig);
			List<NameValuePair> pairList = new ArrayList<NameValuePair>(content.size());
			for (Map.Entry<String, String> entry : content.entrySet()) {
				NameValuePair pair = new BasicNameValuePair(entry.getKey(), entry.getValue());
				pairList.add(pair);
			}
			httpPost.setEntity(new UrlEncodedFormEntity(pairList, Charset.forName("utf-8")));
			response = httpClient.execute(httpPost);
			HttpEntity entity = response.getEntity();
			// System.out.println(response.getStatusLine().getStatusCode());
			int status = response.getStatusLine().getStatusCode();
			resp.setStatus(status);
			if (status==200 && entity!=null) {
				//Content-Type根据文件实际类型设置
				resp.setHeader("Content-Type", "application/pdf;charset=utf-8");
				resp.setHeader("Content-Length", entity.getContentLength()+"");
				resp.setHeader("Content-Encoding", "UTF-8");

				InputStream is = entity.getContent();
				OutputStream os = resp.getOutputStream();

				byte[] buffer = new byte[1024];
				int ch;
				while ((ch = is.read(buffer)) != -1) {
					os.write(buffer, 0, ch);
				}
				is.close();
				os.flush();
				os.close();
			}
		} catch (Exception e) {
			e.printStackTrace();
		}finally {
			if (response != null) {
				try {
					EntityUtils.consume(response.getEntity());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
	}

	/**
	 * 发送 SSL POST 请求（HTTPS），K-V形式
	 *
	 * @param apiUrl API接口URL
	 * @param params 参数map
	 * @return
	 */
	public static String doPostSSL(String apiUrl, Map<String, Object> params) {
		CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(createSSLConnSocketFactory()).setConnectionManager(connMgr)
			.setDefaultRequestConfig(requestConfig).build();
		HttpPost httpPost = new HttpPost(apiUrl);
		CloseableHttpResponse response = null;
		String httpStr = null;

		try {
			httpPost.setConfig(requestConfig);
			List<NameValuePair> pairList = new ArrayList<NameValuePair>(params.size());
			for (Map.Entry<String, Object> entry : params.entrySet()) {
				NameValuePair pair = new BasicNameValuePair(entry.getKey(), entry.getValue().toString());
				pairList.add(pair);
			}
			httpPost.setEntity(new UrlEncodedFormEntity(pairList, Charset.forName("utf-8")));
			response = httpClient.execute(httpPost);
			int statusCode = response.getStatusLine().getStatusCode();
			if (statusCode != HttpStatus.SC_OK) {
				return null;
			}
			HttpEntity entity = response.getEntity();
			if (entity == null) {
				return null;
			}
			httpStr = EntityUtils.toString(entity, "utf-8");
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (response != null) {
				try {
					EntityUtils.consume(response.getEntity());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return httpStr;
	}

	/**
	 * 发送 SSL POST 请求（HTTPS），JSON形式
	 *
	 * @param apiUrl API接口URL
	 * @param json   JSON对象
	 * @return
	 */
	public static String doPostSSL(String apiUrl, Object json) {
		CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(createSSLConnSocketFactory()).setConnectionManager(connMgr)
			.setDefaultRequestConfig(requestConfig).build();
		HttpPost httpPost = new HttpPost(apiUrl);
		CloseableHttpResponse response = null;
		String httpStr = null;

		try {
			httpPost.setConfig(requestConfig);
			StringEntity stringEntity = new StringEntity(json.toString(), "UTF-8");// 解决中文乱码问题
			stringEntity.setContentEncoding("UTF-8");
			stringEntity.setContentType("application/json");
			httpPost.setEntity(stringEntity);
			response = httpClient.execute(httpPost);
			int statusCode = response.getStatusLine().getStatusCode();
			if (statusCode != HttpStatus.SC_OK) {
				return null;
			}
			HttpEntity entity = response.getEntity();
			if (entity == null) {
				return null;
			}
			httpStr = EntityUtils.toString(entity, "utf-8");
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (response != null) {
				try {
					EntityUtils.consume(response.getEntity());
					response.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return httpStr;
	}

	/**
	 * 创建SSL安全连接
	 *
	 * @return
	 */
	private static SSLConnectionSocketFactory createSSLConnSocketFactory() {
		SSLConnectionSocketFactory sslsf = null;
		try {
			SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {

				public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
					return true;
				}
			}).build();
			sslsf = new SSLConnectionSocketFactory(sslContext, new X509HostnameVerifier() {

				@Override
				public boolean verify(String arg0, SSLSession arg1) {
					return true;
				}

				@Override
				public void verify(String host, SSLSocket ssl) throws IOException {
				}

				@Override
				public void verify(String host, X509Certificate cert) throws SSLException {
				}

				@Override
				public void verify(String host, String[] cns, String[] subjectAlts) throws SSLException {
				}
			});
		} catch (GeneralSecurityException e) {
			e.printStackTrace();
		}
		return sslsf;
	}

	/**
	 * 发送 SSL POST 请求（HTTPS），加载证书
	 *
	 * @return
	 */
	public static String doPostSSL(String url, String content, String type, Map<String, String> headers, SSLConnectionSocketFactory sslsf) {
		CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(createSSLConnSocketFactory()).setConnectionManager(connMgr)
			.setDefaultRequestConfig(requestConfig).build();
		HttpPost httpPost = new HttpPost(url);
		CloseableHttpResponse response = null;
		String httpStr = null;

		try {
			httpPost.setConfig(requestConfig);
			if (headers != null) {
				for (String headerName : headers.keySet()) {
					httpPost.setHeader(headerName, headers.get(headerName));
				}
			}
			StringEntity stringEntity = new StringEntity(content, "UTF-8");// 解决中文乱码问题
			stringEntity.setContentEncoding("UTF-8");
			if (JSON.equals(type)) {
				stringEntity.setContentType("application/json");
			} else if (XML.equals(type)) {
				stringEntity.setContentType("application/xml");
			} else {
				stringEntity.setContentType("text/plain");
			}
			httpPost.setEntity(stringEntity);
			response = httpClient.execute(httpPost);
			int statusCode = response.getStatusLine().getStatusCode();
			if (statusCode != HttpStatus.SC_OK) {
				return null;
			}
			HttpEntity entity = response.getEntity();
			if (entity == null) {
				return null;
			}
			httpStr = EntityUtils.toString(entity, "utf-8");
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (response != null) {
				try {
					EntityUtils.consume(response.getEntity());
					response.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return httpStr;
	}

	/**
	 * 自定义POST带请求头
	 * 请求类型为为：application/json
	 */
	public static String doPostWithHeader(String apiUrl, String content, Map<String, String> map) throws IOException {
		CloseableHttpClient httpClient = HttpClients.createDefault();
		String httpStr = null;
		HttpPost httpPost = new HttpPost(apiUrl);
		CloseableHttpResponse response = null;

		for (Map.Entry<String, String> entry : map.entrySet()) {
			httpPost.setHeader(entry.getKey(), entry.getValue());
		}

		try {
			httpPost.setConfig(requestConfig);
			StringEntity stringEntity = new StringEntity(content, "UTF-8");// 解决中文乱码问题
			stringEntity.setContentEncoding("UTF-8");
			stringEntity.setContentType("application/json");
			httpPost.setEntity(stringEntity);
			response = httpClient.execute(httpPost);
			HttpEntity entity = response.getEntity();
			// System.out.println(response.getStatusLine().getStatusCode());
			httpStr = EntityUtils.toString(entity, "UTF-8");
		} finally {
			if (response != null) {
				try {
					EntityUtils.consume(response.getEntity());
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return httpStr;
	}
}
